Overview
Polyethylene (PE31) is a high-density polyethylene (HDPE) polymer widely used in industrial and consumer applications due to its strength, flexibility, and resistance to chemicals and moisture. As a thermoplastic, it can be molded into various shapes, making it ideal for manufacturing pipes, containers, and packaging materials. PE31 is distinguished by its high molecular weight and linear structure, which contribute to its durability and performance under stress. It is a cost-effective material for B2B buyers, offering a balance of mechanical properties and processability.
Physical and Chemical Properties
PE31 exhibits excellent tensile strength and impact resistance, making it suitable for heavy-duty applications. Its low moisture absorption ensures stability in humid environments, while its resistance to acids, alkalis, and organic solvents broadens its utility in chemical storage and transport. The material's melting point ranges between 120–140°C, and it decomposes at higher temperatures without boiling. Its density (0.94–0.97 g/cm³) classifies it as a high-density polyethylene, providing rigidity compared to lower-density variants.
Main Applications
PE31 is extensively used in the production of blow-molded containers, such as bottles for chemicals and detergents, due to its barrier properties. It is also a preferred material for piping systems in water and gas distribution, offering leak-proof joints and long-term durability. In the automotive industry, PE31 is employed for fuel tanks, bumpers, and interior panels. Its lightweight nature and resistance to corrosion make it an attractive alternative to metals. Additionally, it is used in geomembranes for landfill liners and agricultural films.
Safety and Storage
While PE31 is generally non-toxic, precautions should be taken during processing to avoid inhalation of dust or fumes generated at high temperatures. Proper ventilation and personal protective equipment (PPE) are recommended in industrial settings. Storage should be in a cool, dry environment away from direct sunlight and oxidizing agents to prevent degradation. Bulk quantities are typically packaged in sealed bags or containers to maintain quality.
B2B Procurement Guide
When procuring PE31, buyers should specify key parameters such as melt flow index (MFI), density, and UV stabilization requirements based on the intended application. Suppliers may offer custom formulations with additives for enhanced properties like flame resistance or color. Prices vary depending on market conditions, order volume, and supplier location. For reference, bulk purchases (e.g., 20 metric tons) may secure discounts. Always request material certifications (e.g., ISO, FDA compliance) for quality assurance.
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